https://www.aliexpress.com/item/1005006369887180.html
Not totally upgradable, but at least pretty low cost and modern with an optional SATA + NVMe combination for Proxmox. Shovel in an enterprise SATA and a consumer 8TB WD SN850x and this should work pretty good. Even Optane is supported.
IPMI could be replaced with NanoKVM or JetKVM...
You could also go 32gb+ Intel optane Boot and enterprise SATA data, depending on your use case
https://www.aliexpress.com/item/1005006369887180.html
Not totally upgradable, but at least pretty low cost and modern with an optional SATA + NVMe combination for Proxmox. Shovel in an enterprise SATA and a consumer 8TB WD SN850x and this should work pretty good. Even Optane is supported.
IPMI could be replaced with NanoKVM or JetKVM...